New to switching out light fittings as of Wednesday; fitted a couple since then, isolating the supply at the consumer unit and double-checking the wires are no longer live using a contactless voltage checker.
Came to change the ceiling rose bulb fitting in our en-suite – which is already a warning sign as clearly not code compliant?! – and found the wiring a bit odd.
There are two grey cable feeds. I assume this is due to the fitting being on a loop, but I realise that the extractor fan in the bathroom is driven off the same light switch, so perhaps that's one of them?
Both earths connect to an earth terminal on the light fitting.
The neutral connects to the neutral for the bulb fitting (which is a brown wire, thanks to whatever genius rigged this). There is only one neutral and at time of writing I haven't made a note of which cable it emerges from...
Both live fittings connect to 'flex live' on the rose, stuffed into one terminal. The live for the lightbulb fitting is screwed into the other terminal.
My new light fitting has an enclosed plastic box within which there are screw terminals for live, earth and neutral.
Should I replicate the ceiling rose's existing wiring into the new fitting? E.g fit both live to live terminal, both earth to earth terminal, and single neutral to neutral terminal? Or is this existing setup as sketchy as it looks?